Yoda didn't have his lightsaber when he exiled himself to Dagobah(it was taken/destroyed by the Empire after his fight with Palpatine), so saber training was definitely out.
The only training Yoda likely did was furthering his own connection to the Force -- but he still deteriorated significantly over the years. By the time of RotJ, it was stated that Yoda had resorted to prolonging his life with the Force(so that he could stay alive long enough to give some final words of wisdom to Luke), and was circling the drain hard. Even as of ESB it was made clear that Yoda's age had caught up to him.
__________________
"I am tired of Earth. These people.
I am tired of being caught in the tangle of their lives."
From a conference from the late 80's or early 90's (I'm having trouble narrowing it down):
Kasdan: The Force was available to anyone who could hook into it?
Lucas: Yes, everybody can do it.
Kasdan: Not just the Jedi?
Lucas: It’s just the Jedi who take the time to do it.
Marquand: They use it as a technique.
Lucas: Like yoga. If you want to take the time to do it, you can do it; but the ones that really want to do it are the ones who are into that kind of thing. Also like karate. Also another misconception is that Yoda teaches Jedi, but he is like a guru; he doesn’t go out and fight anybody.
Kasdan: A Jedi Master is a Jedi isn’t he?
Lucas: Well, he is a teacher, not a real Jedi. Understand that?
Kasdan: I understand what you’re saying, but I can’t believe it; I am in shock.
Lucas: It’s true, absolutely true, not that it makes any difference to the story.
Kasdan: You mean he wouldn’t be any good in a fight?
I'm not really sure where Yoda was at during ESB... In canon, at least.
I would assume he had physically deteriorated, given that he was just a few years away from death and no longer even had a saber to practice with... But much like Kenobi, you could argue that his spiritual enlightenment and overall connection to the Force had never been stronger. /shrug
__________________
"I am tired of Earth. These people.
I am tired of being caught in the tangle of their lives."
Last edited by Galan007 on Jun 27th, 2020 at 02:06 AM